4G: LTE/LTE-Advanced for Mobile Broadband by Erik Dahlman

LTE (Long time period Evolution) is the 3GPP's (3rd new release Partnership undertaking) new normal and accompanying applied sciences that cellular community operators akin to ATT, Verizon and TeliaSonera are adopting for his or her networks.

to maneuver to higher-speed networks that may cater to shopper call for for cellular broadband multimedia functions, the 3GPP has built the most recent LTE-Advanced (LTE unlock 10) ordinary, so as to be fastened in December 2010. This publication specializes in LTE and LTE-Advanced, and offers engineers with genuine perception and knowing into the why and the way of the normal and its comparable applied sciences. This ebook is written by means of engineers from Ericsson--the world's major telecommunications supplier--who used to be seriously considering the improvement of the standard.

Follow-up to the very winning 3G Evolution, now concentrating on LTE and LTE complicated general and its accompanying technologies

Complete and transparent rationalization of LTE complex through the people who performed a number one position in its improvement, in order to allow engineers to fast grab the newest 3GPP free up 10 average and enforce it of their products

Not a contributed ebook as such a lot others in this subject are: this booklet supplies an built-in advent to the applied sciences and the standard

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This ebook is a part of the IEEE criteria instant Networks sequence. This ebook describes instant neighborhood zone Networks caliber of provider improvements. these improvements let the help of real-time purposes comparable to voice and video. The scope of the booklet comprises: - review of QoS mechanisms and architectures.

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11 Frequency-domain model of OFDM transmission/ reception with “one-tap equalization” at the receiver. the frequency-domain channel taps H0, …, H N c Ϫ1 can be directly derived from the channel impulse response. 10 is the transmitted modulation symbol ak scaled and phase rotated by the complex frequency-domain channel tap Hk and impaired by noise nk. 11. This is often expressed as a one-tap equalizer being applied to each received subcarrier. 11). To be able to do this, the receiver obviously needs an estimate of the frequency-domain channel taps H 0 , …, H N c Ϫ1.

At the same time, if sufficient received signal power can be made available, basically any data rate can, at least in theory, be provided within a given limited bandwidth. l In the case of low-bandwidth utilization – that is, as long as the radio-link data rate is substantially lower than the available bandwidth – any further increase of the data rate requires approximately the same relative increase in the received signal power. This can be referred to as power-limited operation (in contrast to bandwidth-limited operation; see below) as, in this case, an increase in the available bandwidth does not substantially impact what received signal power is required for a certain data rate.

L Similar to the increase in signal-to-noise ratio, proper combination of the signals received at multiple antennas will also increase the signal-to-interference ratio after the antenna combination. l The use of beam-forming by means of multiple transmit antennas will focus the transmit power in the direction of the target receiver, leading to reduced interference to other radio links and thus improving the overall signal-to-interference ratio in the system. l One important difference between interference and noise is that interference, in contrast to noise, typically has a certain structure which makes it, at least to some extent, predictable and thus possible to further suppress or even remove completely.